Magnetic lifting appliance.



G. KRUHNE. MAGNETIC LIFTING APPLIANCE.

Patented Dec. 24, 1912.

APPLICATION FILED JAN. 22, 1912.

Jhr/w/of M/nesyfs fly U U UNITED STATES PATENT OFFICE.

MAGNETIC LIFTING APPLIANCE.

Specification Letters Patent.

Patented Dec .14. 1 912.

Application filed January 22, 1912. Serial No. 672,716.

App aces, of which the following is a The present invention relates to a magnetic lifting apparatus and consists in the provision of a plurality of magnets which are linked together and carried by chains so as to allow of being adjusted to the outlines of the bodies to be operated upon.

In the accompanying drawings the invention isillustrated by way of example, Figure l'representing aside view and a plan of three rectangular magnets which are connected in alinement, Fig. 2, a side view of the same on a reduced" scale and in operative position, Fig. 3, a side View showing a de vice for equalizing the tension of the chains, Fig. 4, a sectional view, on an enlarged scale,

of said equalizing device, Fig. 5, a plan of the same, and Figs. 6 to 8, diagrammatic views showing the magnets in difl'erent combinations.

The electromagnets d are interconnected by links e and are also electrically connected either in parallel or in series. In accordance with the nature of the articles operated upon, the arrangement may either be that shown in Figs. 1 to 3, or any other suitable one, for instance any of those shown in Figs. 6 to 8. If a star or like formation should be'desired, a suitably shaped ma'gnet or connecting piece a is placed in the center as shown in Fig. 8.

The separate magnets are carried by chains f the free ends of which are connected to .a common hoisting. chain or cable.

- This connection may be effected by means of a ring 9, as shownin Figs. 1 to 3, in which case the chains f must be adjusted in length so as to equalize the tension and prevent sagging, such as indicated in Fig. 2, if the magnet system is applied to an uneven surface.

The tension of the chains may also be equalized' automatically by the device shown in Figs. 3 to 5 which device consists of a. domed I are secured at equal distances apart.

disk I) having at its circumference ears it between which the free ends of the chains f In the center'of the disk I) a funnel-shaped depression 2' is provided which is slotted in its deepest portion so as to form a seat for a spherical body 0 on which the disk is supported. The bodycis connected by an eyed shank k and a ring Z to the hoisting'cable. This arrangement, which is shown diagrammatically in Fig. 3, enables the magnet system to be applied indiscriminately to objects of varying, irregular shapes, since the disk I) adjusts itself automatically on the body 0, 'as shown in Fig. 3, in accordance with the position of the magnets. In this mannera firm grip on the articles is always obtained irrespective of their shape.

The disk I) may. be star-shaped instead of circular as shown. The number of magnets employed in the system and also the shape of the magnets may be varied according to requirements. I claim:

1. In a magnetic lifting apparatus, a plurality of magnets, links connecting the same, and chains connecting each magnet separately with a common hoisting cable, substantially as and for the purpose set forth.

2. In a magnetic lifting apparatus. a pinrality of magnets, links interconnecting the same, chains connecting the separate magnets to a common hoistin for automatically equalizing the tension of said chains, substantially as and for the purposeset forth.

3. In a magnetic lifting apparatus, a plurality of magnets, links interconnecting the same, a spherical body connected to the hoisting cable. a "disk supported on said spherical body so as to allow of taking up different angular positions thereon, and

chains connecting the separate magnets with the rim of said disk, substantially as and for the purpose set forth.

. GUSTAV KROHNE.

1 Witnesses:

FRANZ HILGERT,

FRIEDRICH FIX.

Copies of this patent may be obtained for live cents-each, by addressing the Commissioner of Patents,

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